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The Galactic gamma-ray diffuse emission (GDE) is emitted by cosmic rays(CRs), ultra-relativistic protons and electrons, interacting with gas andelectromagnetic radiation fields in the interstellar medium. Here we presentthe analysis of TeV diffuse emission from a region of the Galactic Plane overthe range in longitude of $l\in[43^\circ,73^\circ]$, using data collected withthe High Altitude Water Cherenkov (HAWC) detector. Spectral, longitudinal andlatitudinal distributions of the TeV diffuse emission are shown. The radiationspectrum is compatible with the spectrum of the emission arising from a CRpopulation with an "index" similar to that of the observed CRs. When comparingwith the \texttt{DRAGON} \textit{base model}, the HAWC GDE flux is higher byabout a factor of two. Unresolved sources such as pulsar wind nebulae and TeVhalos could explain the excess emission. Finally, deviations of the Galactic CRflux from the locally measured CR flux may additionally explain the differencebetween the predicted and measured diffuse fluxes.

Galactic Gamma-Ray Diffuse Emission at TeV energies with HAWC Data